"""The tests for the Datadog component."""
from unittest import mock
import unittest

from homeassistant.const import (
    EVENT_LOGBOOK_ENTRY,
    EVENT_STATE_CHANGED,
    STATE_OFF,
    STATE_ON
)
from homeassistant.setup import setup_component
import homeassistant.components.datadog as datadog
import homeassistant.core as ha

from tests.common import (assert_setup_component, get_test_home_assistant,
                          MockDependency)


class TestDatadog(unittest.TestCase):
    """Test the Datadog component."""

    def setUp(self):  # pylint: disable=invalid-name
        """Set up things to be run when tests are started."""
        self.hass = get_test_home_assistant()

    def tearDown(self):  # pylint: disable=invalid-name
        """Stop everything that was started."""
        self.hass.stop()

    def test_invalid_config(self):
        """Test invalid configuration."""
        with assert_setup_component(0):
            assert not setup_component(self.hass, datadog.DOMAIN, {
                datadog.DOMAIN: {
                    'host1': 'host1'
                }
            })

    @MockDependency('datadog', 'beer')
    def test_datadog_setup_full(self, mock_datadog):
        """Test setup with all data."""
        self.hass.bus.listen = mock.MagicMock()
        mock_connection = mock_datadog.initialize

        assert setup_component(self.hass, datadog.DOMAIN, {
            datadog.DOMAIN: {
                'host': 'host',
                'port': 123,
                'rate': 1,
                'prefix': 'foo',
            }
        })

        assert mock_connection.call_count == 1
        assert mock_connection.call_args == \
            mock.call(statsd_host='host', statsd_port=123)

        assert self.hass.bus.listen.called
        assert EVENT_LOGBOOK_ENTRY == \
            self.hass.bus.listen.call_args_list[0][0][0]
        assert EVENT_STATE_CHANGED == \
            self.hass.bus.listen.call_args_list[1][0][0]

    @MockDependency('datadog')
    def test_datadog_setup_defaults(self, mock_datadog):
        """Test setup with defaults."""
        self.hass.bus.listen = mock.MagicMock()
        mock_connection = mock_datadog.initialize

        assert setup_component(self.hass, datadog.DOMAIN, {
            datadog.DOMAIN: {
                'host': 'host',
                'port': datadog.DEFAULT_PORT,
                'prefix': datadog.DEFAULT_PREFIX,
            }
        })

        assert mock_connection.call_count == 1
        assert mock_connection.call_args == \
            mock.call(statsd_host='host', statsd_port=8125)
        assert self.hass.bus.listen.called

    @MockDependency('datadog')
    def test_logbook_entry(self, mock_datadog):
        """Test event listener."""
        self.hass.bus.listen = mock.MagicMock()
        mock_client = mock_datadog.statsd

        assert setup_component(self.hass, datadog.DOMAIN, {
            datadog.DOMAIN: {
                'host': 'host',
                'rate': datadog.DEFAULT_RATE,
            }
        })

        assert self.hass.bus.listen.called
        handler_method = self.hass.bus.listen.call_args_list[0][0][1]

        event = {
            'domain': 'automation',
            'entity_id': 'sensor.foo.bar',
            'message': 'foo bar biz',
            'name': 'triggered something'
        }
        handler_method(mock.MagicMock(data=event))

        assert mock_client.event.call_count == 1
        assert mock_client.event.call_args == \
            mock.call(
                title="Home Assistant",
                text="%%% \n **{}** {} \n %%%".format(
                    event['name'],
                    event['message']
                ),
                tags=["entity:sensor.foo.bar", "domain:automation"]
            )

        mock_client.event.reset_mock()

    @MockDependency('datadog')
    def test_state_changed(self, mock_datadog):
        """Test event listener."""
        self.hass.bus.listen = mock.MagicMock()
        mock_client = mock_datadog.statsd

        assert setup_component(self.hass, datadog.DOMAIN, {
            datadog.DOMAIN: {
                'host': 'host',
                'prefix': 'ha',
                'rate': datadog.DEFAULT_RATE,
            }
        })

        assert self.hass.bus.listen.called
        handler_method = self.hass.bus.listen.call_args_list[1][0][1]

        valid = {
            '1': 1,
            '1.0': 1.0,
            STATE_ON: 1,
            STATE_OFF: 0
        }

        attributes = {
            'elevation': 3.2,
            'temperature': 5.0
        }

        for in_, out in valid.items():
            state = mock.MagicMock(domain="sensor", entity_id="sensor.foo.bar",
                                   state=in_, attributes=attributes)
            handler_method(mock.MagicMock(data={'new_state': state}))

            assert mock_client.gauge.call_count == 3

            for attribute, value in attributes.items():
                mock_client.gauge.assert_has_calls([
                    mock.call(
                        "ha.sensor.{}".format(attribute),
                        value,
                        sample_rate=1,
                        tags=["entity:{}".format(state.entity_id)]
                    )
                ])

            assert mock_client.gauge.call_args == \
                mock.call("ha.sensor", out, sample_rate=1, tags=[
                    "entity:{}".format(state.entity_id)
                ])

            mock_client.gauge.reset_mock()

        for invalid in ('foo', '', object):
            handler_method(mock.MagicMock(data={
                'new_state': ha.State('domain.test', invalid, {})}))
            assert not mock_client.gauge.called